java - 指定AWS Cloudwatch日志客户端的凭证

嗨，我正在尝试在AWS cloudwatch中创建我的Java应用程序代码的异常日志，因为我已经使用CloudWatchLogsClient来放置事件了，但是却出现了以下错误

DEBUG software.amazon.awssdk.auth.credentials.AwsCredentialsProviderChain - Unable to load credentials from SystemPropertyCredentialsProvider(): Unable to load credentials from system settings. Access key must be specified either via environment variable (AWS_ACCESS_KEY_ID) or system property (aws.accessKeyId).
software.amazon.awssdk.core.exception.SdkClientException: Unable to load credentials from system settings. Access key must be specified either via environment variable (AWS_ACCESS_KEY_ID) or system property (aws.accessKeyId).
    at software.amazon.awssdk.core.exception.SdkClientException$BuilderImpl.build(SdkClientException.java:97)
    at software.amazon.awssdk.auth.credentials.internal.SystemSettingsCredentialsProvider.resolveCredentials(SystemSettingsCredentialsProvider.java:58)
    at software.amazon.awssdk.auth.credentials.AwsCredentialsProviderChain.resolveCredentials(AwsCredentialsProviderChain.java:91)
    at software.amazon.awssdk.auth.credentials.internal.LazyAwsCredentialsProvider.resolveCredentials(LazyAwsCredentialsProvider.java:52)
    at software.amazon.awssdk.auth.credentials.DefaultCredentialsProvider.resolveCredentials(DefaultCredentialsProvider.java:100)
    at software.amazon.awssdk.awscore.client.handler.AwsClientHandlerUtils.createExecutionContext(AwsClientHandlerUtils.java:71)
    at software.amazon.awssdk.awscore.client.handler.AwsSyncClientHandler.createExecutionContext(AwsSyncClientHandler.java:68)
    at software.amazon.awssdk.core.client.handler.BaseSyncClientHandler.execute(BaseSyncClientHandler.java:68)
    at software.amazon.awssdk.core.client.handler.SdkSyncClientHandler.execute(SdkSyncClientHandler.java:44)
    at software.amazon.awssdk.awscore.client.handler.AwsSyncClientHandler.execute(AwsSyncClientHandler.java:55)
    at software.amazon.awssdk.services.cloudwatchlogs.DefaultCloudWatchLogsClient.describeLogStreams(DefaultCloudWatchLogsClient.java:1168)
    at com.WorkingwithS3.WorkingwithS3.PutLogEvents.main(PutLogEvents.java:58)

这是我的代码示例

package com.WorkingwithS3.WorkingwithS3;

import com.amazonaws.auth.AWSStaticCredentialsProvider;
import com.amazonaws.auth.BasicAWSCredentials;
import com.amazonaws.regions.Regions;
import com.amazonaws.services.s3.AmazonS3;
import com.amazonaws.services.s3.AmazonS3ClientBuilder;
import software.amazon.awssdk.regions.Region;
import software.amazon.awssdk.services.cloudwatchlogs.CloudWatchLogsClient;
import software.amazon.awssdk.services.cloudwatchlogs.CloudWatchLogsClientBuilder;
import software.amazon.awssdk.services.cloudwatchlogs.model.DescribeLogStreamsRequest;
import software.amazon.awssdk.services.cloudwatchlogs.model.DescribeLogStreamsResponse;
import software.amazon.awssdk.services.cloudwatchlogs.model.InputLogEvent;
import software.amazon.awssdk.services.cloudwatchlogs.model.PutLogEventsRequest;

import java.util.Arrays;
// snippet-end:[cloudwatch.java2.put_log_events.import]

/**
 * Puts a sample CloudWatch log event
 */
public class PutLogEvents {
    public static void main(String[] args) {
        BasicAWSCredentials creds = new BasicAWSCredentials("xxxx",
                "xxxxx");

//        BasicAWSCredentials creds = new BasicAWSCredentials("xxxxxxxx",
//                "xxxx");

        String regionId = "xxx";
        String logGroupName = "xxxx";
        String streamName = "xxxxx";


        // snippet-start:[cloudwatch.java2.put_log_events.main]

        CloudWatchLogsClient logsClient = CloudWatchLogsClient.builder().region(Region.of(regionId)).build();

        // A sequence token is required to put a log event in an existing stream.
        // Look up the stream to find its sequence token.

        // First describe all streams in the log group.
        DescribeLogStreamsRequest logStreamRequest = DescribeLogStreamsRequest.builder()
                .logGroupName(logGroupName)
                .logStreamNamePrefix(streamName)
                .build();
        DescribeLogStreamsResponse describeLogStreamsResponse = logsClient.describeLogStreams(logStreamRequest);

        // Assume that a single stream is returned since a specific stream name was specified in the previous request.
        String sequenceToken = describeLogStreamsResponse.logStreams().get(0).uploadSequenceToken();

        // Build an input log message to put to CloudWatch.
        InputLogEvent inputLogEvent = InputLogEvent.builder()
                .message("{ \"key1\": \"value1\", \"key2\": \"value2\" }")
                .timestamp(System.currentTimeMillis())
                .build();

        // Specify the request parameters.
        PutLogEventsRequest putLogEventsRequest = PutLogEventsRequest.builder()
                .logEvents(Arrays.asList(inputLogEvent))
                .logGroupName(logGroupName)
                .logStreamName(streamName)
                // Sequence token is required so that the log can be written to the
                // latest location in the stream.
                .sequenceToken(sequenceToken)
                .build();
        logsClient.putLogEvents(putLogEventsRequest);
        // snippet-end:[cloudwatch.java2.put_log_events.main]

        System.out.println("Successfully put CloudWatch log event");
    }
}

任何人都可以指导如何为CloudWatchLogsClient指定凭据吗？
提前致谢

最佳答案

从跟踪中我们可以看到在此实例CloudWatchLogsClient.builder()中的sdk客户端无法找到凭据，因此无法构建。
客户端将在以下defaults locations中查找凭据

出于很多原因，设置代码以从环境变量读取凭据非常有好处。

这有很多原因。

AWS鼓励使用environment variables for credentials。

例如，越来越需要在诸如Kubernetes之类的容器集群中运行您的应用程序。

通常在容器化环境中访问文件系统可能会出现问题。

在像docker这样的许多容器工具中，将其琐碎化为pass environment variables to the container。

在链接defaults locations中，它精确地指定了为CloudWatchLogsClient.builder()操作提供凭据的选项，并且由于上述原因，建议您采用环境变量解决方案，并可以使用`测试它们的设置是否正确。

       Map<String, String> mapOfEnvironmentVariables = System.getenv();

检索它们。